Condenser for refrigerating systems



Sept. 4, 1934. F. R. ERBACH CONDENSER FOR REFRIGERATING SYSTEMS Fil ed Dec.

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ATTORNEYS P 1934- F. R. ER BAC ZH 1,972,765 I CONDENSER FOR REFRIGERATING SYSTEMS Filed Dec. 19. 1927 2 Sheets-Sheet 2 y? A zz =J Z1 l j 15 J m if 18 V i E I fieder/ c ggia'ch ix 7* M ATTORNEY.

Patented: Sept. 4, 1934 i I I i i UNITED STATES PATENT OFFICE CONDENSER FOR REFRIGERATING' SYSTEMS Frederick R. Erbach, Detroit, Mich., assignor to Kelvinator Corporation, Detroit, Mich., a. cor- I poration of Michigan Application December 19, 1927,. Serial No. 241,073

4 Claims. (oi. 62115) My invention relates to the science of mechantop of the motor 12 is aguardv or fan housing 15 ical refrigeration and it has particular relation which serves as a support for a. condenser 16. A' to a novel type and arrangement of condensing fan 1'7, mounted upon the shaft of the motor 12; unit adapted to be employed as a portion of medraws cooling air through openings 18in the fan chanical' refrigerating mechanism. housing 15 and forces it through the condenser 16. 60

In the mechanical refrigerating'art it is cus- As best'illustrated in Figs. 2'and 3, the con-w tomary to employ, in a closed refrigerant medenser 16 consists of an outer shell or casing 20, dium circuit, a compressor, a condenser and an the lower edge 21 of which is substantially hori-' evaporator, or cooling unit. The refrigerant, in zontal,.and is secured to the topof the fan hous-' its gaseous state is compressed by the compressor, ing by means of bolts 22 The upper edge 23. 65 cooled and condensed by the condenser and subof the casing is similarly inclined along two sequently gasified in the evaporator. oppositely disposed sides. Disposed within the Heretofore, it has been customary, to employ shell 20 is a radiator core 24, consisting of a plucondensers of the so-called bird-cage type, rality of tubes 25 arranged 'so as to form three a 15 which consists of a large rectangular coil of tubrows, of tubes each parallel with the inclined ing, so disposed as to surround the compressor, portion of the edge 23, and a plurality of spaced which is cooled by a current of air caused by a heat radiating fins 25,'either integral with porfan, which is driven by the same source of power tions of the tubes 25 or rigidly secured thereto, as is the compressor. The chief objection to are disposed at right angles to the tubes 25. 1 By 20 this type of condenser is that it is bulky, and, means of connecting-member 2'7, of substantially because of its low efficiency as a heat transferring U-shape, the tubes of each row are connected in device, the employmentof a large amount of tubseries, constituting three parallel paths of coning is necessary, which renders it expensive to stant inclination for the refrigerant to follow. construct. The upper ends of each of the rows of tubes 25 By my invention I have eliminated these ob- 25 are connected to a header or fitting 28, and,

jections by providing a novel type of condenser in like manner the lower ends of the rows'of which has a high heat transfer capacity, which tubes are connected to a similar header 29. The

is simple and inexpensive to manufacture, and header 28 is connected, by means of a tube 30 of which lends itself not only to a compact arrelatively large cross-sectional area, to the top 3o rangement of the component parts thereof, but of the dome or superstructure 11 mounted on 35 also to compact arrangement with the other units the compressor. The lower header 29 is conof the refrigerating mechanism. nected by. means of a tube31, of relatively small- One object of my invention consists in provid, er cross-sectional area, to the lowermost portion ing a novel type of condenser. of the dome 11. The refrigerant, in the form of 35 Another object of my invention is to provide gas, is discharged under pressure into the dome a novel arrangement of the condenser and the 11 by the compressor: The tube 30 carries the compressor driving motor, and which is particugas to the header 28, which distributes it into larly adapted for use in connection \with refrigthree parallel inclined paths. through the tubes crating mechanisms. 25. As the gas is cooled by contact with the 40 For a better understanding of my invention, tubes 25,'it condenses or liquefles, and in the 9 reierence'may now be had to the accompanying form of liquid drains through the remainder of drawings of which the tubes 25 into the. header 29, thence through Fig. 1 is a side elevational view of amotor comthe tube 31 and back into the dome 11. From pressor unit provided with a condenser constructthe dome 11 the liquid refrigerant passes into 45' ed in accordance with my invention; 1 the evaporator (not shown) of the system where Fig. 2 is a plan view, partially in section, of the it is reconverted into gas and is drawnthereirom condenser illustrated in Fig. 1, and by'the comp'ressorto be again compressed.

Fig. 3 is a side elevational view oi. the structure It will be observed that, by the employment in illustrated in Fig. 1. t the condenser, of tubes which are disposed at a 5'0 Inthe drawingsIhaveillustratedacompressor constant inclination throughout their entire 10 provided with a superstructure or dome 11, and length, the formation of liquid pools or traps adapted to be driven by an. electric motor 12 in any portion of the tubes is prevented, which through a. speed reducing'yorm gear mechanism interfere with the proper movement of gaseous contained within the gear housing 13, mounted refrigerant therethrough,and lower the efficiency 55- upon a supporting mechanism 14. Mounted on of the condenser. Also, it is apparent that, by

use of the headersassociated with the tubes of the condenser I am enabled to secure aplurality of parallel paths for the travel of'the refrigerant through the condenser, thus increasing its capacity. By means of the fan housing 15, I am enabled to mount the condenser 16 directly over I the motor 12 which has mounted on the shaft thereof the fan 17, thus providing a particularly simple and compact arrangement of the condenser and motor compressor unit.

Although I have illustrated but one form of my invention and have described in detail but a single application thereof, it will be apparent to those skilled in the art that it is not so limited but that various modifications and changes may be made therein without departing from the spirit of my invention or from the scope of the appended claims.

What I claim'is:

1. In combination, a compressor, a vertically disposed motor operatively connected thereto, a condenser connected to said compressor and mounted over said motor, said condenser having a bank of tubes disposed in uniform relation to a plane inclined with respect to the horizontal and having an inlet connection adjacent itsupper extremity and an outlet connection adjacent its lower extremity, and a fan mounted on said motor adapted to move cooling fluid through said condenser in an oblique relation to said bank of tubes.

2. In combination, a motor having a vertically disposed shaft projecting therefrom, a" fan mounted on the shaft, a condenser having a bank of tubes disposed in a plane inclined with respect to the horizontal and positioned to receive a blast of air discharged from said motor fan, means for connecting the upper end of the condenser to the high side of a refrigerant compressor, and means for discharging condensed refrigerant liquid from the lower extremity of the condenser.

3. In combination, a refrigerant compressor,.a

motor having .a vertically disposed shaft for drivingsaid compressor, a fan mounted on the shaft, and a condenser for receiving a blast of air from said fan, said condenser having a plurality of parallel banks of tubes disposed in planes intersected by the motor shaft at oblique angles.

FREDERICK R. ERBAC-I-L.

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